Credit Bureau overstatement by service provider

I have 3 contracts with Cell C. This is not a complaint on the cellular services, but more on the manner it affects me on a credit bureau.

In short, the contact center has phoned me back outside of my recommended hours, meaning I missed the call as I was busy with my duties almost a km underground. When I phoned back, i gave the case number, and the agent said he is unable to assist me, and that he will have the agent from the department dealing with my case, to call me back.

Its now 2 and a half days later, still no contact.

The problem is on my credit record that Cell C accounts are overstated, meaning that if I declare my costs with a statement, and a credit check is done, my word is disputed and I am viewed as not being honest on my declarations.

Credit record 1 lists what account 1 costed around 2021 Credit record 2 lists what account 2 costed around 2021 Credit record 3 lists the current costs for account 1, 2 and 3, as a consolidation (as per my monthly statement).

This should be corrected by Cell C, as it is affecting aspects of my credit. I am trying to purchase a house, and I have already been questioned on my honesty and integrity by 2 service providers, as I havent declared all the costs listed.

I mean is it really that difficult to report a consolidated value and REMOVE the previous 2 records at the credit bueau?

Please!!! I want this resolved with urgency!!!